21
Problem
Cause
Remedy
Page
Objective is not correctly engaged in light
path
Make sure that revolving nosepiece
clicks into place correctly.
–
Dirt/dust on extremity of objective
Clean it thoroughly.
2
Dirt/dust on specimen
Clean specimen.
–
g) One side of image is blurred.
Revolving nosepiece is not installed cor-
rectly.
Secure it by pushing in the sliding
dovetail all the way until the stopper.
–
Objective is not correctly engaged in light
path.
Make sure that revolving nosepiece
clicks into place correctly.
–
Parallelism of specimen cannot be
achieved.
Correct specimen to make it parallel
or replace specimen.
12
Specimen is heavier than specified.
Replace the specimen.
h) One side of image is blurred.
Revolving nosepiece is not installed cor-
rectly.
Secure it by pushing in the sliding
dovetail all the way until the stopper.
–
Objective is not correctly engaged in light
path.
Make sure that revolving nosepiece
clicks into place correctly.
–
2. Electrical System
a) Bulb intermittently lights and goes
out.
Bulb is nearly burned out.
Replace bulb.
28
A cord or connector is not properly con-
nected.
Connect cords and plugs securely.
29
b) Lamp bulb burns out soon after
lighting.
The bulb in use is not the specified lamp.
Replace with a standard bulb.
28
c) Brightness cannot be varied with
brightness control.
Light preset switch is set to ON.
Set it to OFF.
7
d) All voltage indicator LEDs light and
the voltage indication cannot be
varied with brightness control.
Lamp bulb is not installed.
Attach lamp bulb.
28
Lamp bulb is burnt out.
Replace lamp bulb.
28
Lamp housing output connector is un-
plugged.
Plug lamp housing output connector.
29
e) Lamp intensity voltage cannot be
increased with brightness control.
Lamp bulb is burned out.
Replace lamp bulb.
28
3. Coarse/Fine Adjustment Knobs
a) Coarse adjustment knob is too
heavy to rotate.
Rotation tension adjustment ring is too
tight.
Loosen ring to an optimum tightness.
8
Pre-focusing lever is locked.
Release pre-focusing lever.
9
b) Stage drifts down by itself or focus
is lost during observation.
Tension adjustment ring is too loose.
Tighten ring to an optimum tightness.
8
c) Specimen cannot be brought into
focus.
Stage height adjustment is too low.
Raise stage holder height.
14
d) Coarse movement cannot reach
upper limit.
Pre-focusing lever is locked at the low
position.
Release pre-focusing lever.
9
12
f ) cont’d
Summary of Contents for BX51M
Page 35: ......
